Expanded-metal manufacture.



f Y ff/ N. CLARK. wf-"f" l BXPANDBD 1MAL MANUPAGTUBB.

' APPLIOATIOE FILED JULY 29. 1907. 947,794.- Patentedv Feb. 1, 1910.

f x11/ua u :To z. Abw/ MME 62 /M/r mlcl l UNITED STATES PATENT essie-E.

Nonits ELMORE' CLARK, 0E PLAI'NVILLE, coNNEe'rIcUr, AssiGNoR rro THENATIONAL METAL Fannie COMPANY, or NEW YORK, N. Y., A eonPoRATioN or NEWYORK.

To ail-Z 'whom/it may concern."

` 'Api'. 25, 1905, I have described a method of sists' in -firstslitting, then expanding and i ingact-ion, however, while it elongatesthe strands, does not materially aii'ec't the widths 'the openings andnarrow the strip. I have EXPANDED-METAL MANUACTURE.

i Be it known that I, Norms vEnMoRE CLARK, 'a 4citizen of the UnitedStates', residing at Plainville, county of Hartford, G omiecticut, haveinvented certain new and useful Improvements in Expanded-MetalManufacture, of which the following as a full, clear, and exactdescription.-

My invention relates toA improvements in expanded metal and the art ofmanufacture. In finy former patent No. 788,093 dated forming expanded'sheet metal which conthen rolling the sheet In that case the materialwas rolled longitudinally of the openings so that the strands weregreatly clongated, and being worked cold, the. elastic lii'nit wasil'iereased.- This method has its' 'advantages and the product isvaluable artieul'arly where a continuous bond from Ind to vend of thestrip is desirable. Such roll of the strands, and in fact does tend toclose discovered that the sheet may be both' elongated andi widened by.rolling it transversely-that is,-aeross ,the narrow way of the ymesh andso -as to reduce the gave. This Icausi`ng` the? metal to ow aerosstIxebonds so that the materia-l has greater strength to resist tearing 'atthe bonds, and `:greater sti 1fness to resist collapse when tension isapplied longitudinally of the strands. These advantages are attainediii-degree even when material is'rolled across the strands' asdisting'uished .from lengthwise of the strands, as j1n my form'ekpatent.Longitudinal rolling seems to draw the strands together and lleloses`th'e o enings, whereas transverse -rol'ling 'takes a vantage 'ofthe-trusslikeornia tion of the strands 'and increases both ldimensionsof the openings. -Certain `of the ad- Va'n-t'a es in method-'and productmay be obtainedg by rolling punched stock, provided 'the openinvs areelongated in form and theV rolling 'is dime transversely. lVhere the di-Y Specicetion'ot Letters Patent.

Application tiled Jf'uly 29,1190?. Serial No. 386,004.

ect'io'n of lengith `of thez'o'pening's before roll-Y ing correspon swith the length of the strip,

the iinproved action and product may be secured by using two pairs ofrolls having their vaxes inclined or converging forwardly in thedirection of feed of the strip, so that they draw the strip forward andat the .sa-nie time stretch and smooth it laterally. Vhcn the gage ofthe n'iaterial is to be reduced to any great extent, vit is preferableto accomplish the reduction by stages, first passing the. Stock forwardthrough the rolls and then backward, so as to prod-nce a more uni-Aforni action and appearance.

Figure l is a plan View of a fragment of material illustrating myinvention during the reducing action. Fig. 2 is a sectional View of thesaine, showing fragments of rolls in the act of reduction. l The stockl, to be treated according to my improved method is illustrated 'at theleft of the line Fig. Land 'after treatment by the rolls 2 and 3 theproduct 4:' is at the right; T he libers of the metal are drawn in thedirection of the rolling action, so that the elastic limit of thenietal, especially at the bonds, is increased and the product is betterqualiied to resist severe. stresses.' Re- '.ducing the gage widens thebonds and strands-in the direction of the rolling so that the productmay have strands and bonds proportionately much wider than would bepossiblel in thi-n fiat material by any other process. The openings inthe stock are '.widened and lengthened by this process, as

before nientioned, and although the increase Patented Feb. 1, 1910.

Ain length is slight, the area. of the product is materially increased.

'Vl/'hat I claim is:-

1. The method of forming expanded metal w-hich'consists in Vfirstforming a sheet made up vof strands permanently vconnected together atintervals with openings betwcei'i 'and arranged ,so that 'the bonds andstra-nds Aare relatively stag-gered y'and then passing Athe sheetthrough'redueing rolls in a direction 4transverse to the llengt-h of thebonds.

2. The method of form-ing expanded sheet metal which consists in forming'elongated openings in 'the vsheet vand then rolling down the sheettransversely to the direction of elongation of the o enings 3. Themethod o Vforx'ning expanded sheet `metal which consists 1n4 providingalter-` nuiely arranged elongated rpenings .in' the sheet :1nd feedingthe sheet between reflui-.ing rolls transverse] to the 'elongatedopenings.

41;.: The metho` of forming .expanded sheet Inetnl, which consists inslitting the stock expanding it and rolling it down at right angles tethe ends of the slits.y

5. The method of treating slitted sheet A metal which includes expandingit' and rollingr it transversely :ind'inerea-sing its superficial area.in two direct-ions.

` 6. The vmethod of forming expandedmetul fronr a sheethsving openingsin staggered arrangement, .which includes rolling itand causing thesimultaneous Widening ofthe 'j Y bonds.

Witnesses:

D. G. CLARK, RQBT. S. ALLYN.A

Nomis- ELMORE CLARK.

